ML20211C283
| ML20211C283 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Diablo Canyon |
| Issue date: | 02/17/1983 |
| From: | Schierling H NRC |
| To: | Eisenhut D, Mattson R, Vollmer R NRC |
| Shared Package | |
| ML20209B155 | List:
|
| References | |
| FOIA-86-151 NUDOCS 8610210314 | |
| Download: ML20211C283 (2) | |
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UNITED STATES
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volimer R. J. Mattson Attached is a list of Diablo Canyon meetings that have been scheduled for the next weeks. The list is based on information provided by Teledyne (IDVP) and PG&E (the Project) as of February 17, 1983.
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Attachment:
As stated
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T. Novak G. Knighton B. Buckley i
L. Rubenstein
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- 0. Parr J. Wermiel J. Knox J. Ridgely R. Kirkwood J. P. Knight G. Lear P. Kuo H. Polk i
M. Hartzman l
8610210314 860930 FOIA PDR PDR HOLMES86-151 l
1
February 17, 1983 5
I MEETINGS SCHEDULED FOR DIABLO CANYON 1.
" Schedule and Administrative Matters" Diablo Canyon Project and IDVP February 17, 1983 San Francisco (NRCnotified2/17) 2.
"IDVP Comments on PG&E Phase I Final Report" Diablo Canyon Project and IDVP February 17, 1983 San Francisco (NRC notified 2/17) 3.
"R. F. Reedy Audit of PG&E --Design Review" Diablo Canyon Project and R. F. Reedy February 18, 1983 San Francisco (NRC notified 2/17) 4.
" Phase II Additional Verification (ITR-34) and E01s" Diablo Canyon Project and IDVP February 23-24 Boston, Mass. (SWEC Offices)
(NRC notified 2/15)
(NRC attendance (Div. of Systems Integration) recommended) 5.
" Structural Review - Containment Annulus and Aux. Building" Diablo Canyon Project, IDVP and consultants February 24-25, 1983 San Francisco (NRC notified officially 2/17)
(NRC attendance (Div. of Engineering) recommended) 6.
"Udall Hearings on Diablo Canyon" PG&E, NRC, et al.
March 8, 1983 Washington (Attendance by IDVP recommended) 7.
" Oral Arguments before Appeals Board regarding reopening of low and full power license hearings" March 16, 1983
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FEB 161933 MEMORANDUM FOR: George E. Lear, Chief Structural & Geotechnical Engineering Branch, DE '
George W. Knighton, Chief Licensing Branch No. 3, DL FROM:
Harold Polk. Structural Engineer Structural & Geotechnical Engineering Branch, DE Hans Schierling, Project Manager Licensing Branch No. 3, DL
SUBJECT:
MEETING NOTES OF PGr>E/IDVP MEETING ON DIABLO CANYON UNIT 1 STRUCTURAL A'lALYSES, FEBRUARY 4,_1983, SAN FRANCISCO On February 4,1983 the PG&E Diablo Canyon Project (DCP) briefed and described to the IDVP (Teledyne Engineering Services) and its consultants (M. J. Holly l
and J. M. Biggs) the status of the PG&E analyses for the containment annulus steel structure and the auxiliary building floor and wall loadinqs.
H. Polk and H. Schierling of the NRC staff and A. J. Phillippacopoulos of BNL attended the meeting. The technical consultant to Joint Intervenors was represented.
A list of attendees is attached.
Containment Annulus Structure The Project reanalyzed the annulus steel structure for seismic loads using a
" frame" concept for each radial beam. The mass of the tangential steel beams and supported equipment was incorporated into the adjacent radial beams in the frame. Floor response spectra were generated for various nodal points on the individual radial beam frames and compared with the original URS/Blume spectra.
The new spectra generally exceed the URS/Blume spectra at most frequencies of interest. The DCP proposed to modify the structure so that the new spectra would be comparable to the current Hosgri spectra.
The new spectra are generally controlled by the columns at the containment wall.
The modifications proposed are additional columns under the tangential beams at about 20 locations and some stiffening of the radial beams. The piping would be reanalysed incorporat-ing the tangential beams which were not evaluated'in the seismic analysis. The new response spectra will be.psed for the piping evaluation and equipment qualification. Two detailed piping problems were presented but results t;ere not yet available.
PG&E proposed to use a sensitivity study of supported piping mass to structure mass to justify the adequacy of the existing structure at certain locations.
Based on the status of the analysis it is doubtful that the structural modifica-tions could be designed and installed in accordance with the currently projected l
fuel load date.
The IDVP and the staff need to review the nodifications cricr to tne fugl load dects.1on. As of this cate tne frojRt has rGDrovided-ferrai i
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..docurenta f ion..on...the.a lalys i s..or..th'e..nndi f.ications.
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The seismic analysis has been completed and is currently being used in evaluating the structure adequacy. PG&E has retained a consultant (Jack Benjamin) to evaluate the acceptance criteria and to assist in evaluating the structure. The measured naterial properties will be used in the structural evaluation in accordance with the provisions of the ACI Code.
The implicit assumption of the floor slabs acting as rigid diaphrams in generating the seismic nodel was discussed.
DCP proposed to use a three-stick nodel for determing the torsional loads and load distribution due to the floor diaphram ficxibility.
Future Action The IDVP requested that the information provided at the meeting be documented in sufficient detail for evaluation. PG&E will present the analyses for the annulus steel structure and the auxiliary building floor loading in the next su.oplement (February 15,1983) to the PG&E Phase I Final Report.
PGAE suggested.
a neeting with the IDVP for the week of February 21, 1983 in San Francisco to provide the IDVP with further information.
Original signed by:
Harold Polk Structural Engineer Structural & Geotechnical Engineering Branch Division of Engineering Original signed by:
Hans Schierling, Project flanager Licensing Branch No. 3 Division of Licensing
Attachment:
As stated Distribution:
Document Control 50-275 LBS.3 Reading File PRC System GLear HPolk GKnighton H5chierling TNovak JLee
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